http timeout when calling into a unicorn process

gistfile1.rb

#==== Gemfile ====
source :rubygems

gem 'sinatra', :require => 'sinatra/base'
gem 'rest-client'
gem 'unicorn'
gem 'puma'

#==== config.ru ====

require "rubygems"
require "bundler/setup"
require "sinatra"

require File.expand_path 'app'

run UnicornTimeout

#==== app.rb ====
require 'rest_client'

class UnicornTimeout < Sinatra::Base

  get "/dashboard" do
    content_type "text/plain"
    begin
      result = RestClient::Request.execute(:method => :get, :url => "http://localhost:9292/status", :timeout => 10, :open_timeout => 10)
      "Dashboard received: #{result}"
    rescue StandardError => e
      e.message
    end
  end

  get "/status" do
    content_type "text/plain"
    "Status: 'ok'"
  end

end